Exclusive Video: A Great Big World talks MS revelation, new Broadway musical before Summerfest

A Great Big World fans, we've got an exclusive for you! Pop duo Ian Axel and Chad Vaccarino talked about their upcoming Broadway musical with Tap Milwaukee before playing the Harley-Davidson Roadhouse at Summerfest Saturday...and they sang something from the musical!

Ok, ok...so Axel actually only sang one word from the musical. But hey, you heard that word here first. ;)

The group--which has had an incredible year thanks to the breakout success of its single "Say Something", featuring Christina Aguilera--also talked about Vaccarino's recent revelation that he was diagnosed with multiple sclerosis--and the inspiring feedback from fans following his announcement.

And when asked about the greatest advice they ever received, Vaccarino instead shared the worst advice he'd ever gotten.